Notice to Members
Notice No. 322
08/27/2004
Margin Rate and Tier Changes for Natural Gas Fututres (NG), Henry Hub Swap Futures (NN), and Natural Gas e-miNY Futures (QG) Contracts
FFECTIVE DATE: Monday, August 30, 2004 (close of business)

FUTURES CONTRACTS: Natural Gas, Henry Hub Swaps and e-miNY Natural Gas Contracts

CONTRACT MONTHS: All Natural Gas Contract Months
NG/NN Scan and Intra-Commodity Spread Tiers
Tiers
New
Old
1
1st Nearby
1st Nearby
2
2nd Nearby
2nd Nearby
3
3rd Nearby
3rd - 4th Nearby
4
4th - 6th Nearby
5th - 8th Nearby
5
7th Nearby
9th Nearby
6
8th Nearby
10th - 16th Nearby
7
9th - 14th Nearby
17th - 20th Nearby
8
15th - 18th Nearby
Greater than 20th Nearby
9
Greater than 18th Nearby
N/A

NYMEX Division Outright (Scan) Margins on Natural Gas Futures (NG)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$3,500
$4,000
$3,850
$4,400
$4,725
$5,400
2
$3,500
$4,000
$3,850
$4,400
$4,725
$5,400
3
$4,000
$3,750
$4,400
$4,125
$5,400
$5,063
4
$4,250
$4,250
$4,675
$4,675
$5,738
$5,738
5
$3,000
$3,000
$3,300
$3,300
$4,050
$4,050
6
$2,000
$2,500
$2,200
$2,750
$2,700
$3,375
7
$2,500
$3,000
$2,750
$3,300
$3,375
$4,050
8
$3,000
$1,500
$3,300
$1,500
$4,050
$2,025
9
$1,000
N/A
$1,100
N/A
$1,350
N/A

NYMEX Division Outright (Scan) Margins on Henry Hub Swap Futures (NN)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$875
$1,000
$963
$1,100
$1,181
$1,350
2
$875
$1,000
$963
$1,100
$1,181
$1,350
3
$1,000
$938
$1,100
$1,031
$1,350
$1,266
4
$1,063
$1,063
$1,169
$1,169
$1,434
$1,434
5
$750
$750
$825
$825
$1,013
$1,013
6
$500
$625
$550
$688
$675
$844
7
$625
$750
$688
$825
$844
$1,013
8
$750
$375
$825
$413
$1,013
$506
9
$250
N/A
$275
N/A
$338
N/A

NYMEX Division Outright (Scan) Margins on Natural Gas e-miNY Futures (QG)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$1,750
$2,000
$1,925
$2,200
$2,363
$2,700
2
$1,750
$2,000
$1,925
$2,200
$2,363
$2,700

NYMEX Division Intra-Commodity Spread Margins on Natural Gas Futures (NG)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$500
$1,000
$550
$1,100
$675
$1,350
2
$500
$1,000
$550
$1,100
$675
$1,350
3
$500
$500
$550
$550
$675
$675
4
$500
$500
$550
$550
$675
$675
5
$500
$500
$550
$550
$675
$675
6
$500
$500
$550
$550
$675
$675
7
$500
$250
$550
$275
$675
$338
8
$500
$250
$550
$275
$675
$338
9
$250
N/A
$275
N/A
$338
N/A

NYMEX Division Intra-Commodity Spread Margins on Henry Hub Swap Futures (NN)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$125
$250
$138
$275
$169
$338
2
$125
$250
$138
$275
$169
$338
3
$125
$125
$138
$138
$169
$169
4
$125
$125
$138
$138
$169
$169
5
$125
$125
$138
$138
$169
$169
6
$125
$125
$138
$138
$169
$169
7
$125
$63
$138
$69
$169
$84
8
$125
$63
$138
$69
$169
$84
9
$63
N/A
$69
N/A
$84
N/A

Current systems calculate the margin requirement for spread positions by first determining the "Scan Risk" and then multiplying the number of spreads by a rate set by the Exchange. Scan Risk is determined by netting the outright margin required for each leg of a spread. Spreading between differently margined contracts results in a higher spread margin than between equally margined contracts. Below is provided an example where the legs of a spread are margined differently.

Scan Risk Example at Clearing Member Rates

A spread consisting of one NG leg in Tier 1 and another in Tier 6 will have its requirement (at the clearing member rates) calculated at $2,000 starting on Monday, August 30, 2004.

One Long Tier 1 NG 	(1 * $3,500) 	= $3,500
One Short Tier 6 NG (1 * $2,000) = $2,000
Net Scan Risk ($3,500-$2,000 = $1,500
Spread Rate (1* $ 500) = + $ 500
Total Requirement = $2,000
Summary Clearing Member (Maintenance Margin): $2,000
Member Customer (Initial Margin): $2,200
Non-Member Customer (Initial Margin): $2,700
Should you have any questions or require any further information, please contact exchangeinfo@nymex.com